Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
(((U/j)^2-(R+L)^2)/(2*pi*F)^2)^1/2; R=200, L=1.5, F=100000,U=4,j=2.50/200
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random